87180211 has 2 divisors, whose sum is σ = 87180212. Its totient is φ = 87180210.

The previous prime is 87180209. The next prime is 87180241. The reversal of 87180211 is 11208178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87180211 - 2¹ = 87180209 is a prime.

Together with 87180209, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87180211.

It is not a weakly prime, because it can be changed into another prime (87180241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43590105 + 43590106.

It is an arithmetic number, because the mean of its divisors is an integer number (43590106).

Almost surely, 2^87180211 is an apocalyptic number.

87180211 is a deficient number, since it is larger than the sum of its proper divisors (1).

87180211 is an equidigital number, since it uses as much as digits as its factorization.

87180211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 87180211 is about 9337.0343792877. The cubic root of 87180211 is about 443.4104988763.

Adding to 87180211 its reverse (11208178), we get a palindrome (98388389).

The spelling of 87180211 in words is "eighty-seven million, one hundred eighty thousand, two hundred eleven".